how does Fujitsu Lifebook tablet stylus work?
Posted by
admin 26 January, 2010
like its not electratic so how does the computer know the difference between it and a finger or something. and how does it know the difference between the earser part and the pen part?
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Questions & Answers
It’s all electronic but how it works depends on the screen technology used.
If you’re talking a touchscreen then it is a passive digitizer. An ultra-fine mesh is embedded in the screen. When electrified if produces a weak magnetic field. When the screen is touched the slight deflection of the screen affects the field at that points, and X & y co-ordinates can be determined from that.
On a Wacom-type electromagnetic “active” digitizer the same electrified micro mash is present and some circuitry in the pen reacts to the magnetic field from up to 1/2 inch away. This again disrupts the magnetic field and is then detected.